Measurement of distributions sensitive to the underlying event in inclusive Z-boson production in pp collisions at √s = 7
TeV with the ATLAS detector

Journal

European Physical Journal C

Volume | Issue number

74 | 12

Article number

3195

Number of pages

33

Document type

Article

Faculty

Faculty of Science (FNWI)

Institute

Institute for High Energy Physics (IHEF)

Abstract

A measurement of charged-particle distributions sensitive to the properties of the underlying event is presented for an inclusive
sample of events containing a Z-boson, decaying to an electron or muon pair. The measurement is based on data collected using
the ATLAS detector at the LHC in proton-proton collisions at a centre-of-mass energy of 7 TeV with an integrated luminosity
of 4.6 fb−1. Distributions of the charged particle multiplicity and of the charged particle transverse momentum are measured
in regions of azimuthal angle defined with respect to the Z-boson direction. The measured distributions are compared to similar
distributions measured in jet events, and to the predictions of various Monte Carlo generators implementing different underlying
event models.

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